Acids bases
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Acids & Bases. Our Goals. To determine the difference between Acids & Bases Discuss the importance of studying Acids & Bases Perform an experiment dealing with Acids & Bases. What is the pH scale?. The pH scale measures how acidic or basic a solution is. The pH scale.

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Acids & Bases

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Acids bases

Acids & Bases


Our goals

Our Goals

  • To determine the difference between Acids & Bases

  • Discuss the importance of studying Acids & Bases

  • Perform an experiment dealing with Acids & Bases


What is the ph scale

What is the pH scale?

  • The pH scale measures how acidic or basica solution is.


The ph scale

The pH scale

  • The pH scale is the concentration of hydrogen ions in a given substance.

  • ION:an element with a charge due to a loss or gain of an electron


Identifying acids and bases

Identifying Acids and Bases

  • Acids have a ph from 0-7

  • Lower pH value indicates a stronger acid.

  • Bases have a pH from 7-14

  • Higher pH value indicates a stronger base.


Definitions of acids and bases

Definitions of Acids and Bases

  • An acid is a substance that breaks into ions in an aqueous solution.

  • A Base (alkaline) is a substance that breaks into ions in an aqueous solution.

  • Note: aqueous solution is any solution where is the solvent.


Did we miss something

Did we Miss something??

  • What happens when the pH of a substance is 7?

  • Ans: A pH level of 7 indicates a Neutral Substance i.e: Water!


Test your knowledge

Test Your Knowledge

  • What is the range of an ACID on the pH scale?

    Ans: 0-7

  • What is the range of a BASE and what is another name for a BASE?

    Ans: 7-14, Alkaline


Characteristics of acids

Characteristics Of Acids

Acids can be characterized by:

  • A sour taste.

  • It turns blue litmus paperred

  • It tastes sour. Try drinking lemon juice (citric acid)


Characteristics of bases

Characteristics of Bases

A Base is characterized by:

  • A bitter taste. (Milk of Magnesia)

  • It feels slippery. (Soapy Water)

  • It turns Red LitmusBlue.


Phenolphalein demo

Phenolphalein Demo

  • http://studyjams.scholastic.com/studyjams/jams/science/matter/acids-and-bases.htm


Why learn about acids bases

Why Learn about Acids & Bases?

  • What do you think is the pH level of FairLawn tap water?

  • The pH of a swimming pool must be checked periodically. Why?

  • Is it important for Lakes & Rivers to maintain a certain pH?


Today s experiment

Today’s Experiment

  • Test the pH of Citrus fruit, shampoo, milk of magnesia, tap water, soap and dissolved salt.

  • GOOD LUCK!!!


Experiment

Experiment

color of litmus paper acid or base

  • Pepsi:

  • Tap water:

  • Drain Cleaner:


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